These are well rounded 2-bay/4-bay NAS. If the price is similar to its older brother (the 251 without the A), then I'm pretty sure that a lot of people are going to be happy with it. I just compared the different 2-bay versions (here) and the only thing that I'm missing in the 251A is the JumboFrame (but it might be a glitch in the comparative, because it doesn't make much sense to take it off). Hope I can find a serious review for this NAS.